Reversing-valve for engines



(No Model.)

H. VINEYARD. REVERSING VALVE FOR ENGINES.

Patented Mar. 11, 1890.

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HUBER VINEYARD, OF FLORENCE, MONTANA.

REVERSlNG-VALVE FOR ENGINES.

SPECIFICATION forming part of Letters Patent No. 423,194, dated March11, 1890.

Application filed March 28, 1889. serial No. 305,104. (No model.)

To all whom it may concern.-

Be it known that I, HUBER VINEYARD, of Florence, in the county ofMissoula, State of Montana, have invented certain new and usefulImprovements in Reversing-Valves for Engines, of which the following isaspecification.

The object of my invention is to provide means for reversing a steam orother engine without the use of link motion or other device involvingthe use of more than one eccentric and without involving the necessityof otherwise changing the motion of the valve as derived from theeccentric.-

My invention consists, mainly, in providing different sets of passagesor ports so arranged as that steam or other motive fluid may be directedto one or the other end of the cylinder by bringing into use one or theother set of ports or passages.

It further consists in the parts and combinations hereinafter describedand claimed.

In the accompanying drawings, Figure 1 is a longitudinal section of acylinder and valve-chest in which my invention is embodied. Fig. 2 is acentral cross section, and Fig. 3 is a plan View, of the same.

A is the cylinder; B, the valve-chest.

C O are the cylinder-ports, leading from the valve-chest to thecylinder.

D is the valve regulating the admission and exhaust of steam or othermotive fluid to and from the cylinder, and is reciprocated by aneccentric or equivalent device in any wellknown manner.

As shown, the valve D is cylindrical or belongs to the class known aspiston valves. The said valve D contains two sets of ports E E and F F,the latter being shown in dotted lines in Fig. 1, and appearing, also,in the section of the valve shown in Fig. 2. The ports EE, I call directports, because when in operation they lead steam directly into thenearest end of the cylinder. The passages F F cross each other, and whenin operation lead steam into the end of the cylinder most distant fromthe point of its admission, and I therefore designate them as crossports or passages. As shown, these direct and cross ports pass throughthe valve D in a plane at right angles to each other, or approxt matelyso, so that a revolution of the valveD through an angle of ninetydegrees brings the openings of one or the other set of ports to registerwith the cylinder-ports O 0.

Various means maybe employed for rotating the valve D; but a preferredmode is shown in the drawings. It consists of astud G, projectingthrough the side of the steamchest and in axial line with the valve D.It is provided on the outside with a handle H, which may be partiallyrotated, a catch I being provided for retaining it in position. Theinner end of the stud G may be square or provided with a feather andfits a corresponding hole in the valve D, so that the valve may moveendwise on the stud, but is compelled to turn with it. Thus by movingthe handle II the valve D may be rotated, so as to bring either theports F or the ports E into operation. I11 order to permit thisrotation, the valve-stem J is made in two parts, which are joined by aswivel-joint, as K, of any suitable description.

The construction of the steam-chest B is plainly shown as to its upperpart in the figures. Steam is admitted to the part b, and adivision-wall L separates the exhaust-opening 1) from the part Z).

To prevent leakage, packing-rings P P P may be inserted in the valve Don each side of the port-openings E E and F F, as shown.

The operation is as follows: When the valve D is in the position shownin Figs. 1 and 2, the cross-ports are in operation, the direct portsbeing not in communication either with the steam-chest ports or thecylinderports, and with the valve in the position shown in Fig. 1 steamis entering the righthand port F and being discharged into the left-handport 0, while the steam is being exhausted from the right-hand port 0,and the effect is to move the piston in the direction of the arrow. If,however, the valve D were rotated a quarter-turn, the direct ports E Ewould then become operative and steam would pass from the valve-chestopening to the right-hand cylinder port 0 and steam would be exhaustedfrom the left-hand cylinder-port C, the result being to drive thepisston in the opposite direction, and therefore reverse the engine.

I clainiv The combination, with the cylinder-ports or an engine, ofapiston-valve containing direct ports and crossed ports, a valve-chesthaving inlet and exhaust openings, mechanism for reciprocating saidvalve, whereby the motorfiuid is admitted to and exhausted from thecylinder, and mechanism for rotating it,

whereby either thestraight or crossed ports are brought into action andthe direction of lo revolution of the engine controlled, essentially asdescribed.

HUBER VINEYARD. Witnesses:

'IHos. HARRINGTON, GEO. DALGLIERN.

